Ralf Gyllenhammar (born1966) is vocalist, songwriter and rhythm guitarist of the Swedish Hard Rock/Stoner/Metal Band MUSTASCH.. In the beginning of the 90s he played with Hannes Hansson, Mats Hansson und Mats Johansson in a punkrock band called Grindestone, which disbanded in 1995. From 1995 till 1998 Gyllenhammar, using the stage name Ralph Lennart, sang in the Swedish Thrash/Stoner band B-Thong.

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